I grew up quite socially isolated. I think listening to such audio in the background might help me learn to have actual conversations. (In addition to audiobooks and meetup groups for social anxiety. I can't afford therapy.)

Try hanging out in a local coffee shop. Keep going back to the same one regularly. I say "local coffee shop" because if you choose one that is not a chain you will get a richer conversation experience.

More diverse. A local shop is going to have more of a culture with regular customers who are talking about things other than coffee and the weather. This would make more sense than trying to find recordings of normal, unscripted conversations.

I think that's stereotyping both local and chain coffee shops. I have conversations with the baristas at my local Starbucks. They know me by name, and, for example, the other day I was in there and they were asking how my wife was after her surgery.

I think it's more about size, staff retention and frequency of patronage than who owns it.